Arabic Keyboard's problem

Arabic Keyboard's problem

My friend has updated his Samsung S2 to 4.0.3
he has a problem in the keyboard
as you see in the picture
for example at the letter ا there is another letter which is أ .
Before the update , when you quickly double click the letter it writes the second letter.
After the update this feature has stopped.
How can I fix this ?
thanks in advance

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